Dissertation > Excellent graduate degree dissertation topics show

Ecological Study on Functional Groups of Microorganisms in the Water Body of Internal River, Zhenjiang and Its Applications

Author: ChaiXiaoJuan
Tutor: ChuJinYu
School: Jiangsu University
Course: Environmental Engineering
Keywords: functional microorganism in water Yangtse River zhenjiang sphorus bacteria pesticide decompose
CLC: X172
Type: Master's thesis
Year: 2007
Downloads: 174
Quote: 2
Read: Download Dissertation

Abstract


Microorganisms play significant role in the energy flow and nutriments recycle in aquatic ecosystem. To study the distribution of physiological groups of bacteria and analyze the correlation between which with the main environment factors can accurately understand the status and role of bacteria in the aquatic ecosystem of Yangtse River.The subject is a crosshead of the function of biology on the control of pollution, that is the sub-issue of environmental improvement、repairing technique and synthetically demonstrating in Zhenjiang water environment. We make a survey of the population distribution of microorganisms in the water body of Yangse River and a study of microorganisms decontaminating organic contamination. These thorough literature、theory analysis and experiment is provided for the zoology repairing technique and supervision. The results show that:1.The distribution of functional groups of microorganisims in the water body of Yangse River were studied. The results showed that The the population of diversified microorganisims from internal river (4#、5#)、Beigushan wetland (3#、6#) to the bank (1#、2#) increase and correlates with the content of correlated nutrient salt in water body. The correlation between heterotrophic bacteria and BOD5 was 0.952 which reflect the water pollution level and be important indicators of water quality. The correlation between organic phosphorus decomposing bacteria, inorganic phosphorus decomposing bacteria and TP was 0.893, 0.865, respectively. The correlations between ammonifying bacteria and TN, NH3-N were0.921, 0.899, The correlation between nitrifying bacteria and NH3-N was 0.861.2.Organic phosphorus decomposing bacteria in the samling water of 1# spot is made bionomics observing and Physiology Biochemistry study on Jan ,2006 in order to providing evidence for identification. Molecular biology identification shows that this bacteria and Acinetobater junii have high homology. l6SrDNA sequence comparability and Molecular Phylogeny was performed based on analysis 16SrDNA sequence of organic phosphorus decomposing bacteria JD1.The result shows that organic phosphorus decomposing bacteria JD1 and some bacteria in Pseudomonas performed phylogenesis of decomposing dimethoate. Tolerant limit to pH severally is 5.0~5.5 and 9.0~9.5.The optimal pH is 7.0~7.5.The optimal time is 30~35℃and be about 32℃when bacterium mass reach the best high.3.Acinetobater junii could resist to dimethoate up to 500mg/L. bacterium growth isn’t restrained .The optimal condition for growth and biodegradation were pH 7.2, temperature 32℃, liquid quantity 1/5, the quantum of inoculation 7%. Different original concentration influence the degradation rate for dimethoate so that waste water pretreatment should be considered in industry application.

Related Dissertations

  1. Isolation & Characterization of a Cetochlor Degrading Strain Y3B-1 and Its Degrading Characteristics,X172
  2. Endophytic Fungal Diversity and Their Secodary Metabolites of Eleven Dominant Plant Species in the Dry-hot Valley of Yuanjiang, Yunnan Province, China,X172
  3. Isolation and Characterization of Carbendazim-Degrading Strains, Cloning and Expression of the mheI Gene,X172
  4. Isolation, Identification and Degradation Characteristics of a Benazolin-Ethyl Degrading Bacteria and Degradation Pathway,X172
  5. Studies on the Isolation of Oil-Degrading Bacteria with Biosurfactant Production and Their Characteristics,X172
  6. Isolation and Identification of Pyrene-Degrading Strain SE12 and Its Degrading Effect,X172
  7. Isolation, Identification and Degrading Characteristic of a Cyhalofop-Butyl-Degrading Bacteria, and Cloning, Expression of a Cyhalofop-Butyl-Hydrolyzing Gene chbH,X172
  8. Characterization of an Atrazine-Degrading Strain, Cloning of Key Degrading Related Genes and Construction of a Gene Cluster,X172
  9. Isolation and Characterization of Fenoxaprop-P-Ethyl Degrading Bcteria Strain MEPE-0128 and Purification of a Fenoxaprop-P-Ethyl Hydrolase,X172
  10. Biochemical Characterization and Molecular Modification of a Novel Marine Mud-derived Pyrethroid Hydrolase,X172
  11. Characterization of a Mp-Degrading Strain Sphingopyxis sp.DLP-2, Cloning and Functional Verification of Tnmpd,X172
  12. Expression of Three 2,3-Dihydroxybiphenyl 1,2-Dioxygenase Genes from Biphenyl-Degrading Strain BP3 and Characterization of the Products,X172
  13. Research on Isolation and Polyphasic Taxonomy of a Phenol Tolerant Novel Species-Comamonas Zonglianii BF-3~T,X172
  14. Isolation & Characterization of 3-Phenoxybenzoic Acid-Degrading Strain BA3 (Sphingobium Sp.) and Construction of Genetically Engineered Microorganism,X172
  15. Study on the Screening and Properties of Degradation Coking Waste Water Advantage Strains,X172
  16. Increased Cd and Cu Accumulation and Heavy Metal-tolerance of Plants by ACC-deaminase Producing Bacteria and the Mechanisms,X172
  17. Polycyclic aromatic hydrocarbons degradation of the growth characteristics of bacteria in soil remediation,X172
  18. Triclocarban toxicology and its degradation Bacterium,X172
  19. Heavy metal ions on methane -oxidizing bacteria growth characteristics of,X172
  20. Charcoal on pear soil carbon - nitrogen - phosphorus, and microbial diversity.,X172
  21. White rot fungi on PAHs adsorption and biodegradation of biological repair,X172

CLC: > Environmental science, safety science > The basic theory for the Environment and Science > Environmental Biology > Environmental Microbiology
© 2012 www.DissertationTopic.Net  Mobile